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G608XX Flowmeter

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g608xx manual

Text of G608XX Flowmeter

  • Technical SpecificationFLUXUS G608**-A2

    TSFLUXUS_G608xx-A2V1-5-2EN_Leu, 2014-03-20 1

    FLUXUS G608 supported by handle

    Measurement with transducers mounted by the portable Variofix VP

    Measurement with the flow transmitter fixed to the pipe by the QuickFix pipe mounting fixture

    FLUXUS G608

    FLUXUS G608

    Portable Ultrasonic Flow Measurement of Gas in Hazardous Areas

    Portable instrument for non-invasive, quick ultrasonic flow measurement with clamp-on technology for all types of piping

    Features

    Precise bi-directional and highly dynamic flow measure-ment with the non-intrusive clamp-on technology

    High precision at fast and slow flow rates, high tem-perature and zero point stability

    Portable, easy-to-use flow transmitter with 2 flow chan-nels, multiple inputs/outputs, an integrated data logger with a serial interface

    Extremely resistant carbon fiber housing Covered by ATEX/IECEx zone 2 certification Compact and very lightweight, allowing the measuring

    system to be easily carried as personal luggage, e.g. for offshore visits

    Water tight; resistant against oil, many liquids and dirt Li-Ion battery provides up to 14 hours of measurement

    operation Automatic loading of calibration data and transducer

    detection for a fast and easy set-up (less than 5 min), providing precise and long-term stable results

    User-friendly design Transducers available for a wide range of inner pipe

    diameters ( ) and fluid temperatures ( )

    Rugged transducers (ATEX/IECEx zone 1 and 2,resistant to rough environments, dust and humidity)

    Robust, water-tight (IP67) transport case with compre-hensive accessories

    QuickFix for fast mounting of the flow transmitter indifficult conditions

    Applications

    Designed for the following industries: Upstream (on- and offshore) Midstream and downstream (pipelines and refineries) Chemical industry Energy sector (e.g. HVAC, geothermal, power plants)

    6...1600 mm-40...+200 C

  • FLUXUS G608**-A2 Technical Specification

    Table of Contents

    TSFLUXUS_G608xx-A2V1-5-2EN_Leu, 2014-03-202

    Function ........................................................................................................................................................... 3Measurement Principle ..................................................................................................................................... 3Calculation of Volumetric Flow Rate ................................................................................................................. 3Number of Sound Paths.................................................................................................................................... 4Typical Measurement Setup ............................................................................................................................. 5Standard Volumetric Flow Rate ........................................................................................................................ 6

    Flow Transmitter ............................................................................................................................................. 7Technical Data .................................................................................................................................................. 7Dimensions ....................................................................................................................................................... 9Standard Scope of Supply ................................................................................................................................ 9Adapters (optional).......................................................................................................................................... 10

    Transducers................................................................................................................................................... 12Transducer Selection ...................................................................................................................................... 12Transducer Order Code .................................................................................................................................. 15Technical Data ................................................................................................................................................ 16

    Transducer Mounting Fixture ...................................................................................................................... 26

    Coupling Materials for Transducers............................................................................................................ 27

    Damping Mats (optional) .............................................................................................................................. 28

    Connection Systems..................................................................................................................................... 29Transducer Cable............................................................................................................................................ 29

    Clamp-on Temperature Probe (optional) .................................................................................................... 30

    Wall Thickness Measurement (optional)..................................................................................................... 31

  • TSFLUXUS_G608xx-A2V1-5-2EN_Leu, 2014-03-20 3

    Technical Specification FLUXUS G608**-A2

    Function

    Measurement PrincipleIn order to measure the flow of a medium in a pipe, ultrasonic signals are used, employing the transit time dif-ference principle. Ultrasonic signals are emitted by a transducer installed on the pipe and received by a sec-ond transducer. These signals are emitted alternately in the flow direction and against it.As the medium in which the signals propagate is flowing, the transit time of the ultrasonic signals in the flowdirection is shorter than against the flow direction.The transit time difference, t, is measured and allows the flowmeter to determine the average flow velocityalong the propagation path of the ultrasonic signals. A flow profile correction is then performed in order to ob-tain the area averaged flow velocity, which is proportional to the volumetric flow rate.Two integrated microprocessors control the entire measuring process. This allows the flowmeter to removedisturbance signals, and to check each received ultrasonic wave for its validity which reduces noise.

    Calculation of Volumetric Flow Rate

    = kRe . A . ka . t/(2 . tfl)where

    Path of the ultrasonic signal Transit time difference t

    - volumetric flow ratekRe - fluid mechanics calibration factorA - cross-sectional pipe areaka - acoustical calibration factort - transit time differencetfl - transit time in the medium

    V

    V

  • 4 TSFLUXUS_G608xx-A2V1-5-2EN_Leu, 2014-03-20

    FLUXUS G608**-A2 Technical Specification

    Number of Sound PathsThe number of sound paths is the number of transits of the ultrasonic signal through the medium in the pipe.Depending on the number of sound paths, the following methods of installation exist: reflection arrangement

    The number of sound paths is even. Both of the transducers are mounted on the same side of the pipe. Correct positioning of the transducers is easier.

    diagonal arrangementThe number of sound paths is odd. Both of the transducers are mounted on opposite sides of the pipe. In the case of a high signal attenuation by the medium, pipe and coatings, diagonal arrangement with 1 sound path will be used.

    The preferred method of installation depends on the application. While increasing the number of sound pathsincreases the accuracy of the measurement, signal attenuation increases as well. The optimum number ofsound paths for the parameters of the application will be determined automatically by the transmitter.As the transducers can be mounted with the transducer mounting fixture in reflection arrangement or diagonalarrangement, the number of sound paths can be adjusted optimally for the application..

    a - transducer distance

    Reflection arrangement, number of sound paths: 2

    Diagonal arrangement, number of sound paths: 3

    Diagonal arrangement, number of sound paths: 1 Diagonal arrangement, number of sound paths: 1,negative transducer distance

    a

    a

    a > 0 a < 0

  • TSFLUXUS_G608xx-A2V1-5-2EN_Leu, 2014-03-20 5

    Technical Specification FLUXUS G608**-A2

    Typical Measurement Setup

    ATEX zone 2

    ATEX zone 2/ATEX zone 1

    !

    " # " $ %

    outputs

    ATEX zone 2

    damping mat

    outside of explosive atmosphere

    output adapter

    (power adapter)

    transducers

    temperature probes

    transmitter

    !

    " # " $ %

    ATEX zone 2 ATEX zone 1

    transducers

    outputs

    damping mat

    outside of explosive atmosphere

    (power adapter)

    output adapter

    transmitter

  • 6 TSFLUXUS_G608xx-A2V1-5-2EN_Leu, 2014-03-20

    FLUXUS G608**-A2 Technical Specification

    Standard Volumetric Flow RateThe standard volumetric flow rate can be selected as physical quantity to be measured. It will be calculated in-ternally by:

    N = . p/pN . TN/T . 1/Kwhere

    The operational pressure p and the operational temperature T of the medium will be entered directly as fixedvalues into the transmitter.

    or:If inputs are installed (optional), pressure and temperature can be measured by the customer and fed in thetransmitter.